1985 318 California cop car motor with 360 heads and a good MP purple cam 268 ( they no longer make this cam, but comps has something similar) or so made lots of power and was damn fun to drive. I would talk to Gilroy Automotive Machine. He knows a lot about mopars. He has done work for some, including myself , mopar guys down in the south bay. He does engines and heads. Do not take it the guys in Cupertino, I think its Clarks machining never meet people that are so full of themselves.
I bought a 318 with 9 to 1 compression and an edelbrock cam. I decided to try the swirl port 302 heads vs the 360 heads. If I had to do it again I would use 360 heads . This is in a 64 dart with a 4 speed.
Assuming you are an automatic, stick with 9 to 1 or 9 to 5 compression with 360 heads and you will enjoy it